A new "glass screen", used in glass smoking apparatuses, developed using multiple hollow tubes to obtain a "multi holed" pipe as opposed to a pipe in which air flows through only one chamber. Currently most commonly found on Wolfhole bats "onies". Originating in Fort Wayne Indiana. Nothing Smokes like a Wolfhole
Excuse me sir, do you happen to have any Wolf hole Bats?
by Wolfhole tech November 08, 2011